Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Signal to noise ratio (SNR) of speckle contrast according to camera exposure time for a flow velocity of 1 mm/s. (b) Relation of SFI increases with flow velocity. SFI image of phantom experiments in the (c) static state, and (d) dynamic state, respectively.
